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Endostelium zonatum (L. S Olive and Stoian) W. E Benn and L. S Olive
Life   Amoebozoa   Eumycetozoa   Protosteliaceae   Endostelium


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Overview
Grows and sproulates on various bacteria or on combinations of two food organisms such as Aureobasidium pullulans and a bacterium, or on two bacteria, according to preference of the particular isolate. This species is readily recognized by the large bell-shaped or pyriform spores excentrically positioned at the tips of conspicuously zonate stalks. Stalks 47-120 µ long, appearing zonate from the series of small round vesicles that they contain, stalk base expanded to 7.8-15.6 µ; Spores typically bell-shaped or pyriform, 14.5-40.5 x 24-46.5µ, averaging 28.1x 31.1 µ; protoplasts non-pigmented, typically uninucleate, but also plurinucleate, usually with a single large contractile vacuole. The amoebae are comparatively large and, in water, develop numerous filose pseudopodia. Some cells have two contractile vacuoles. The amoebae show much variation in cell and nuclear size. The cells multiply by binary fission. Plurinuceate protoplasts are not uncommon in some cultures, the number of nuclei ranging from 2 to 16 or more. Prespore cells round in outline. Microcysts very thin-walled, globose to subglobose or slightly irregular in outline, 22-40 µm diam.

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Acknowledgements
The Eumycetozoan Project -- working to understand the ecology, sytematics and evolution of myxomycetes, dictostelids and protostelids -- the true slime molds.

Sponsored by grants from the National Science Foundation.


Feedback
Please send any corrections and comments about this page to John Shadwick
Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701, USA
email: jshadwi@uark.edu
phone: USA-479-575-7393.


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Updated: 2024-03-28 17:10:40 gmt
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